APPENDIX, 168 
quantity for laboratory experiments. These experiments showed 
that any of the crystalline bodies would prevent the growth of the 
tubercle bacillus if present in the proportion of 1 in 10,000, and in 
any ordin cultivating medium for this bacillus. The effect of 
results in leucorrhea in the dose of 2-4 centigrammes (Rép. de 
Pharm,, Oct., p, 481). (Pharm, Journ,, Oct. 31, 1891.) 
Pluchea lanceolata. 
Description.—Shrubby, hoary pubescent, with sessile, very coria- 
ceous, oblong or oblanceolate entire leaves, one to two inches in 
length, having strong very oblique nerves on both surfaces. When 
“he the leaves are of a pale yellowish-green. Heads of flowers in 
ompound corymbs about the size of Groundsel, purple, involucre 
ie contracted at the ee outer bracts obtuse, hoary.” The 
as no marked ta 
Chemical iid ae, taste of these leaves is saltish and 
aromatic, ey yield, in an air-dried state, 16°93 per cent, of 
mineral matter, consisting largely of alkaline chlorides, the cubical 
erystals of which were deposited on inspissating the alcoholic and 
aqueous extracts of the plant, Caoutchouc, and an organic-acid 
giving a green precipitate with ferric —— were present, but no 
alkaloid. We have tried some experim with preparations of 
Pluchea leaves, and conclude chat weight Ter weight, they are much 
weaker than senna leaves in their cathartic action. 
The Existence of a Mydriatic Alkaloid in Lettuce. 
The attention of the author was drawn a few months ago to the 
mydriatic action of an extract prepared at Hitchin from common 
lettuce, Lactuca sativa, when in flower. On examination, the myd- 
riatic action was found to be due to an alkaloid. The extract 
closely resembled belladonna extract in appea: ; 
but a dose of 5 grains m taken without injurious effects. 
an extract of wild lettuce, Zactuca virosa, prepared according to the 
directions of the British Pharmacopeia, the history of which was 
unknown, and extracts of both the wild and the cultivated lettuce 
